Gas Furnaces

Furnace service.

Chaves Heating & Air Conditioning, Inc. provides superior heating services in Hudson, MA and surrounding communities. We are the leading company for all of your heating needs. If you are in need of repairs, maintenance, or a brand new system, the technicians and consultants at Chaves are the qualified professionals for the job.
In addition to providing the highest quality of service, we aim to educate our customers - informed decisions are good decisions. It is important that you have confidence in our ability to perform the service for which you are hiring us. Call us or request service online.

How Much Money Can a New Furnace Save You?

Our AFUE energy savings calculator can help determine how much you could save on your utility bills. Simply enter your current unit's AFUE value and compare it to a newer, more efficient system. You can even customize it to better match your home's system for a more accurate calculation.

AFUE Energy Savings Calculator

{{ afueOld }}% vs {{ afueNew }}%

{{ annualNaturalGasSavingsPercent() }}%

{{ afueOld }}%
${{ afueAnnualOperatingCostOldUnit() }}
Annual Cost
{{ afueNew }}%
${{ afueAnnualOperatingCostNewUnit() }}
Annual Cost

Estimated 15-Year Savings:*
${{ projectedNaturalGasSavings }}

{{ year }} {{ state }} average residential natural gas retail price of ${{ rateResidentialNaturalGas }}/Mcf**.
*Based on an average annual rate increase of {{ avgUtilityIncrease }}%.

This calculator does not guarantee actual costs or savings and is only to be used for educational purposes.

Customize to Your Home

Adjust these settings for a more accurate calculation:




Rate ($/Mcf)


Average Annual Heating Hours***

Historical Comparison

{{ state }}'s natural gas prices compared to {{ yearFifteenYearsAgo }}.

{{ yearFifteenYearsAgo }}


${{ priceFifteenYearsAgo }}/Mcf

{{ yearTenYearsAgo }}

{{ differenceTenYears }}

${{ priceTenYearsAgo }}/Mcf

{{ yearFiveYearsAgo }}

{{ differenceFiveYears }}

${{ priceFiveYearsAgo }}/Mcf

{{ year }}

{{ differenceCurrentYear }}

${{ rateResidentialNaturalGas }}/Mcf

** Data from U.S. Energy Information Administration
*** Data from 2002 EPA study

** Data for Canadian cities from
*** Data from

Furnace Repair

Don't get left in the cold! Our team is here to keep your home warm and cozy. We repair all makes and models of gas and propane furnaces. Our technicians are honest, hard working, and always transparent about the work we do.

Furnace Replacement

Sometimes a repair is not sufficient to fix your furnace. At times a new furnace is the most cost and energy efficient solution. Performing repairs or service on a system in need of replacement is counter productive and costly. We will always help you to determine whether a repair or replacement is the best option.

If you do need a furnace replacement, we know how overwhelming it can be. Here are some of the frequently asked questions about furnaces that we get from some of our Hudson, MA residents:

What Are The Different Types Of Furnaces?

Single Stage: A single-stage furnace has only one stage of operation. It can either be turned on or turned off.

Two Stage: A two stage furnace has two settings - full and half speed. This is a more efficient way to hear and provides more comfort by moving air at a slower pace.

Variable Stage or Modulating: Modulates the speed and heat output based on the temperature outside and the desired comfort level inside. This type of furnace is the most efficient as it only works as much as you need it to.

What Is AFUE?

AFUE, or Annualized Fuel Utilization Efficiency, is a measure of furnace-heating efficiency. The higher the AFUE, the more efficient the furnace.

What Size Furnace Do I Need?

We can calculate an appropriately sized furnace by determining how many BTU’s (British Thermal Units) are required to heat your home. Contrary to what you might think, a bigger furnace does not necessarily mean better or more heating power. Call us at Chaves HVAC, and we can set up an appointment to calculate the furnace size you might need.

Gas Furnace Repair in Sudbury, MA, 01776

“The problem was identified and promptly fixed by the technician. After fixing the problem, he explained what had caused the malfunction. He was courteous, communicated clearly and was very professional.
Thank you.”
- Alem T.

Gas Furnace Repair in Hudson, MA, 01749

“Technician was very informative and knowledgeable.”

- Mark N.

Gas Furnace Repair in Hudson, MA, 01749

“Technician was very informative and knowledgeable.”

- Mark i.

Gas Furnace Maintenance in Marlborough, MA, 01752

“TJ Swanfeldt performed the maintenance on our gas furnace very well.
After completion, he reviewed all of the work that he had performed in easy to understand terminology.

TJ was courteous in our discussions and left the work area clean.”

- Dominic D.

Gas Furnace Replacement in Hudson, MA, 01749

“Awesome staff and responsive when in need!”

- Jan L.

Gas Furnace Repair in Other, 01545

“Rob was very efficient and solved the problem in a very short time. Thanks Rob!”

- Jim D.

Gas Furnace Repair in Marlborough, MA, 01752

“My furnace conked out when the outside temp was 26 degrees. It was a Sunday and Chaves was not open. I pressed the number for an emergency and gave the person the information. I did receive a call and because this was my only heat source he came to my house. He fixed the problem and explained to me that it was caused by an error made when my furnace was serviced a couple of months ago. Chaves charged me nothing. I was extremely impressed with the prompt and honest service for an emergency call on a Sunday. Chaves is terrific!”

- Karen N.

Gas Furnace Repair in Other, 01510

“From when I called in to when Mark came was only a couple hours. Mark was professional, courteous, explained what he was going to do any why and met his projected estimate. Chaves technicians have always been top notch. Thank you.”

- Suzanne Y.

Gas Furnace Maintenance in Other, 01581-3830

“Excellent service. Friendly and helpful tech. Clearly explained everything.”

- Royal S.

Gas Furnace Maintenance in Marlborough, MA, 01752

“Eric was very professional and knowledgeable and did a great job!”

- Robert H.

Need Furnace Service?

Contact the experts at Chaves HVAC.

Call us at 978-562-5309!